Anyone else in the same predicament

Me and DH have had protected sex ONE time The whole time we have been together . We got pregnant very fast I mean the first try with William (my son) after we had him we haven't done anything to prevent besides me taking the "mini pill" for less then a week at four weeks pp . We'll here we are with a ten month old and still haven't concieved baby number two . I'm hoping breast feeding is a contributing factor as to why .. But it's so frustrating that my cycles used to be like clock work every 28 days ! And I knew exactly when I was ovulating without having to use opks. Now I have light spotting every 6 weeks ... And have had no EWCM . Maybe I'm not ovulating ???  Is it possible to have AF and not ovulate ? I'm really fed up with all the post baby changes that have taken place in my body ! My first period returned January 30th . I do see changes in cm , unlike before my period returned I had none .